Sewing-machine.



PATENTEDDEO. 3. 1907.

P. J. KAUPMANN. SEWING MACHINE; APPLIOATION FILED MAR. 23, 1907.

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No. 872,945. 7 PATENTED DEG. 3-, l90'7. P. J. KAUPMANN.

SEWING MACHINE. APPLICATION FILED MAR, 23, 1907.

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110.8%,945. PATENTEDDEG. 3, 1907. F. J. KAUFMANN.

SEWING MACHINE.

APPLICATION FILED MA1L23; 1907.

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No. 872,945. PATENTED DEC. 3, 1907.

F, J. KAUFMANNf SEWING MACHINE.

APPLIOATIOK FILED MAR, 23, 1907.

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UNTED STATES PATENT OF FRANK J. KAUFMANN, OF FULTONVILLE, NEW YORK, ASSIGNOR OF ONE-HALF TO OHARLE W. HEOKERT, OF FULTONVILLE, NEW YORK. V

SEWING-MACHINE.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed March 23- 1907. Serial No. 364048.

To all whom it may concern.

Be it lmown that I, FRANK J KAUFMANN, of Fultonville, in the county of Montgomery and State of New York, have invented cer tain new and useful Improvements in Sewing-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

The object of my present invention is to provide certain improvements in sewing machines, which particularly adapt them for sewing finger tips on material for silk gloves.

Figure 1 shows a perspective view from what may be termed the front of a machine having my improvements applied thereto. Fig. 2 is a perspective view from the side, except that a small portion of the base is broken out to exhibit details of the construction. Fig. 3 is a perspective view from the front, with materials in position in the machine. Fig. 4 is a detailed view of one of the feeding wheels in connection with the mechanism by means of which it is mounted and driven in the machine. Fig. 5 is an enlarged detail showing in section the position of the materials being operated upon in the machine. Fig. 6 shows other details appertaining to the supporting plate, guide wire, cloth guide, etc. Figs. 7 and 8 show sections of the cloth guide in connection with a portion of the supporting plate which form features of my improvements. Fig. 9 shows a removable supplemental guide employed in connection with the machine when operating on narrower materials.

Referring to the reference letters and figures in a more particular description, 1 indicates the body or casing of the sewing machine, of an ordinary and well known construction, the details of which it is not necessary to describe. The essential working parts of the ordinary machine are the needle bar 2 carrying the needle 3 and the looper 4 constituting the stitching mechanism. Supported on the front of the machine on a vertically adjustable stand 5 is a work supporting plate 6, the upper edge of which is arranged in a horizonta plane immediately below the plane of the needle 3, and this plate 6 is arranged substantially at right angles to the needle 3. Immediately at the needle 3 there is provided a pair of knurled feeding rolls 7 and 8, which are adapted to grip the materials being operated upon therebetween substantially in the same vertical plane with the needle 3. The plate 6 necessarily terminates at a point in advance of that at which the peripheries of the feeding wheels 7 and 8 are adapted to engage the fabric, and a feeding guide is provided in a wire 9, which is attached to and practically constitutes a continuation of the upper edge of the feeding plate 6. The farther end of the wire 9 is rigidly secured to a pivoted arm 10, the same being pivoted at 11 tothe upper end of a vertically adjustable support 12 on the machine. The angular position of the arm 10 with reference to the stand 12 may be adjusted by a screw 13. By operating the screw 13 the wire guide 9 may be given more or less of an upwardly bowed position for purposes which will hereinafter a pear.

At the extreme upper end the feed wheels 7 and 8 are provided with grooves 7 8"", which form together between the meeting peripheries of the two wheels an oval or eggshaped opening through which passes the wire guide 9. The knurled faces 7 8 of the feed wheels are arranged immediately below these grooves, and the materials are gripped between the knurled faces below the guide 9, as well as by the comparatively sharp edge of the feed wheels which are above the cated at any desired position on the lower portion of the cylinder 8. It is shown in the drawings as being located at the extreme lower end of the cylinder. The feed wheel 7 is mounted upon the upper end of a vertical shaft 16, which shaft is mounted in a fixed bearing 17 supported from the body of the machine. This feed wheel 7 is driven by the reciprocating pawl 18 found on the ordinary sewing machine ofthe class in question, which engages with a ratchet wheel 19 on the shaft 16. The feed wheel 8 with its cylinder and appurtenances is mounted upon the upper end of a sleeve 20, which sleeve is mounted on an upright stud 21. secured in the outer end of a swinging lever 22. The upright stud 21 is provided with a fixed collar 21, on which the lower end of the sleeve 2Q rests. It is also provided with a screw-thread 21", by

. means of which the stud can be vertically adjusted with reference to the lever 22, and when so adjusted may be locked by the set screw 21, which is adapted to engage with a smooth place between sections of the thread 21 on the stud. The sleeve 20 with the feed wheel 8 is driven from the shaft 16 by means of the meshing gear pinions 24 and 25 provided on the lower end of the shaft 16 and the sleeve 20. In practice these gears 24 and 25' will be covered or housed in order to obviate the materials being operated on becoming entangled therein.

The lever 22, which is arranged in the base of the machine frame, is mounted on a pivot 23 and extends to the rear of the body of the machine where it is provided with a connection 26, by means of which it may be oper ated from a treadle. The feed wheel 8 being carried by the lever 22 may be operated into open or closed position with reference to the feed wheel 7 by means of the lever 22, and is normally held under tension against the face of the wheel 7 by the operation of spring 27 interposed between a suitable shoulder 28 provided on the machine frame and the rear end. of the lever 22. This spring exerts a downward pressure onthe rear end of the lever 22. The front end of the lever 22 also carries rigidly connected thereto a post 30,

. which. at its upper end is provided. with a finger 31 adapted to support the needle after it has passed through the materials, and also carries a pair of cloth guides 32 for purposes hereinafter mentioned.

In connection with the material support ing plate 6 and the guide 9 there is provided a top guide 35 and'cloth holding finger 36. This guide 35 is in general form half coneshaped and is supported by an arm 37 for vertical adjustment at the slot 37, and is located directly over the upper edge of the plate 6 and practically at the end of the plate adjacent to the needle. The finger 36 is supported from the guide 35 and is adapted to hold the cloth down onto the guide wire 9 immediately at or in very close proximity to the point where the needle is operating on the material.

The main piece A of the material to be operated upon is folded over the upper edge of the guide plate 6, with the shorter depending edge running in contact with the guide 6. The tipping piece or strip B is in case of a relatively wide strip inserted through the opening a in the guide 32 and passed partially around the cylinder 8 and engaged at its upper edge between the peripheries of the feeding wheels 7 and 8. The loweredge of the finger 36 as to its upper edge.

erases the strip B is held and guided by the shoulder on the upper side of the ring 15 on the lower end of the cylinder. As the piece B passes around with'the cylinder 8, it passes in close approximation to the guide 35 and In inserting the piece A the guide 35 serves to gather it together around the upper edge of the plate 6 and direct it under the holding finger 36 and to the point where it is gripped between the feeding wheels 7 and 8. When the two pieces have been properly entered, they are fed by the rotation of the wheels 7 and 8 across the path of the needle, and the needle being in operation will stitch or overcast the upper raw edge of the piece B and the folded edge of the piece A. This work requires to be done withthe greatest nicety as the stitches should not show through on the face of the piece A after the sewing operation when the piece is laid out flat.

In inserting the pieces of material preparatory to the sewing operation, the feed wheel 8 may be thrown away from the wheel 7 a suflicient distance to allow the fabrics to be inserted by throwing up the rear end. of the with the greatest precision and nicety, which is essential for the class of work for which this machine is particularly designed.

In case it is desired to utilize the machine on work employing a narrower tipping strip and. a narrower overturned edge on the main piece of fabric, the tipping strip will be fed through the opening bin the guide 32, the adjustable ring 15 will be moved. up the cylinder 8 to a corresponding and suitable position, and the supplemental guide 40 will be secured to the plate 6 superimposed upon the guide 6 and secured to the plate 6 by suitable screws, the screw holes for the same being ordinarily provided and such are shown in Fig. 1.

The mechanism heretofore described enables the feed wheels 7 and 8 to be adjusted with a nicety with reference to each other and to the needle, and the adjustments in the supports of the guide plate '6, together with the guide wire 9, provide for a fine adjustment of these parts with reference to the needle, and the arrangement is generally such that the machine may be adjusted to very fine close work at the point where the needle is operating.

What I claim as new and desire to secure by Letters Patent is:

l. The combination in a sewing machine of a stitch forming mechanism, the work supporting plate, the continuation thereof in a v stantially as set forth.

2. The Combination in a sewing machine of the feedlng wheels having coincidmg grooves in their operative faces, and a guide extending between the feeding Wheels through, the opening provided by said coinciding grooves, substantially as set forth.

3. The combination in a sewing machine of the stitch forming mechanism, including a reciprocating needle, a guide extending transversely to the needle, driven feeding wheels having grooved faces affording a space through which the guide passes arranged to grip the material substantially in the vertical plane of the needle and while the same is held by the guide, substantially as set forth.

4. The combination in a sewing machine of a stitch forming mechanism, including a reciprocating. needle, a wire material guide extending past the needle in close proximity thereto, feeding wheels gripping the material above and below the guide and at a point substantially in the vertical plane of the needle, substantially as set forth.

5. The combination in a sewing machine of the character described of the work supporting plate having a guide thereon, the wire guide providing a continuation of the upper edge of the plate, a sewing mechanism including a reciprocating needle arranged to operate at right angles to and in close proximity to said guide wire, driven feeding wheels adapted to forward the material along the wire past the needle, a top guide for holding the folded edge of the material down in close proximity to the guide wire, and means for guiding the tipping strip, substantially as set forth.

6. The combination in a sewing machine of the work supporting plate, the continuation of guiding edge of said plate in a guide wire, the sewing mechanism including a reciprocating needle arranged transversely to the guide wire, the feeding wheels, one of which includes a cylinder around which one piece of material is fed, and a top guide for holding the material down on the guide wire at the point of stitching, substantially as set forth.

7. The combination in a sewing machine of the character described, of thematerial supporting and guiding plate having an edge guide for the material, the continuation of the upper edge of the supporting plate in a guide wire, a stitch forming mechanism including a reciprocating needle operating transversely to the guide wire, a pair of feed wheels arranged to grip the material between their faces substantially in the vertical plane of the needle and recessed in their faces to receive the said guide Wire, a top guide arranged to hold the folded edge of material down onto the said guide wire, a driven cylinder provided in connection with one of said feed wheels, and guides for feeding a strip of material around said cylinder to and between the gripping faces of the said wheels, substantially as set forth.

8. The combination in a sewing machine of the character described of a stitchingmechanism including a reciprocating needle, a work holding and guiding plate, a continuation of the edge of the guiding plate in a wire, a pair of feeding wheels arranged with the operating sections of their faces substantially in the same vertical plane with the needle and with their meeting edges in line with said plate and grooved to provide an opening toreceive said wire continuation, a cylinder provided in connection with one of the feeding wheels, a guide for directing a band of material upon said wheel and cylinder, and a top guide holding and guiding the folded edge of the material closely on and along said wire continuation, substantially. as set forth.

In witness whereof, I have affixed my signature, in presence of two witnesses, this 6th day of March 1907.

FRANK J. KAUFMANN.

Witnesses:

JOHN BROOKMAN, S. W. HORNING. 

